Viewing file:  ClassLoader52.php (6.1 KB) -rw-rw-rw-
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<?php
/*
* Copyright (c) 2013, Christoph Mewes, http://www.xrstf.de
*
* This file is released under the terms of the MIT license. You can find the
* complete text in the attached LICENSE file or online at:
*
* http://www.opensource.org/licenses/mit-license.php
*
* --------------------------------------------------------------------------
*
* 99% of this is copied as-is from the original Composer source code and is
* released under MIT license as well. Copyright goes to:
*
* - Fabien Potencier <fabien@symfony.com>
* - Jordi Boggiano <j.boggiano@seld.be>
*/
class xrstf_Composer52_ClassLoader {
private $prefixes = array();
private $fallbackDirs = array();
private $useIncludePath = false;
private $classMap = array();
private $classMapAuthoratative = false;
private $allowUnderscore = false;
/**
* @param boolean $flag true to allow class names with a leading underscore, false to disable
*/
public function setAllowUnderscore($flag) {
$this->allowUnderscore = (boolean) $flag;
}
/**
* @return array
*/
public function getPrefixes() {
return $this->prefixes;
}
/**
* Turns off searching the prefix and fallback directories for classes
* that have not been registered with the class map.
*
* @param bool $classMapAuthoratative
*/
public function setClassMapAuthoritative($classMapAuthoratative) {
$this->classMapAuthoratative = $classMapAuthoratative;
}
/**
* Should class lookup fail if not found in the current class map?
*
* @return bool
*/
public function getClassMapAuthoratative() {
return $this->classMapAuthoratative;
}
/**
* @return array
*/
public function getFallbackDirs() {
return $this->fallbackDirs;
}
/**
* @return array
*/
public function getClassMap() {
return $this->classMap;
}
/**
* @param array $classMap class to filename map
*/
public function addClassMap(array $classMap) {
if ($this->classMap) {
$this->classMap = array_merge($this->classMap, $classMap);
}
else {
$this->classMap = $classMap;
}
}
/**
* Registers a set of classes, merging with any others previously set.
*
* @param string $prefix the classes prefix
* @param array|string $paths the location(s) of the classes
* @param bool $prepend prepend the location(s)
*/
public function add($prefix, $paths, $prepend = false) {
if (!$prefix) {
if ($prepend) {
$this->fallbackDirs = array_merge(
(array) $paths,
$this->fallbackDirs
);
}
else {
$this->fallbackDirs = array_merge(
$this->fallbackDirs,
(array) $paths
);
}
return;
}
if (!isset($this->prefixes[$prefix])) {
$this->prefixes[$prefix] = (array) $paths;
return;
}
if ($prepend) {
$this->prefixes[$prefix] = array_merge(
(array) $paths,
$this->prefixes[$prefix]
);
}
else {
$this->prefixes[$prefix] = array_merge(
$this->prefixes[$prefix],
(array) $paths
);
}
}
/**
* Registers a set of classes, replacing any others previously set.
*
* @param string $prefix the classes prefix
* @param array|string $paths the location(s) of the classes
*/
public function set($prefix, $paths) {
if (!$prefix) {
$this->fallbackDirs = (array) $paths;
return;
}
$this->prefixes[$prefix] = (array) $paths;
}
/**
* Turns on searching the include path for class files.
*
* @param bool $useIncludePath
*/
public function setUseIncludePath($useIncludePath) {
$this->useIncludePath = $useIncludePath;
}
/**
* Can be used to check if the autoloader uses the include path to check
* for classes.
*
* @return bool
*/
public function getUseIncludePath() {
return $this->useIncludePath;
}
/**
* Registers this instance as an autoloader.
*/
public function register() {
spl_autoload_register(array($this, 'loadClass'), true);
}
/**
* Unregisters this instance as an autoloader.
*/
public function unregister() {
spl_autoload_unregister(array($this, 'loadClass'));
}
/**
* Loads the given class or interface.
*
* @param string $class the name of the class
* @return bool|null true, if loaded
*/
public function loadClass($class) {
if ($file = $this->findFile($class)) {
include $file;
return true;
}
}
/**
* Finds the path to the file where the class is defined.
*
* @param string $class the name of the class
* @return string|null the path, if found
*/
public function findFile($class) {
if ('\\' === $class[0]) {
$class = substr($class, 1);
}
if (isset($this->classMap[$class])) {
return $this->classMap[$class];
}
elseif ($this->classMapAuthoratative) {
return false;
}
$classPath = $this->getClassPath($class);
foreach ($this->prefixes as $prefix => $dirs) {
if (0 === strpos($class, $prefix)) {
foreach ($dirs as $dir) {
if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
return $dir.DIRECTORY_SEPARATOR.$classPath;
}
}
}
}
foreach ($this->fallbackDirs as $dir) {
if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
return $dir.DIRECTORY_SEPARATOR.$classPath;
}
}
if ($this->useIncludePath && $file = self::resolveIncludePath($classPath)) {
return $file;
}
return $this->classMap[$class] = false;
}
private function getClassPath($class) {
if (false !== $pos = strrpos($class, '\\')) {
// namespaced class name
$classPath = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)).DIRECTORY_SEPARATOR;
$className = substr($class, $pos + 1);
}
else {
// PEAR-like class name
$classPath = null;
$className = $class;
}
$className = str_replace('_', DIRECTORY_SEPARATOR, $className);
// restore the prefix
if ($this->allowUnderscore && DIRECTORY_SEPARATOR === $className[0]) {
$className[0] = '_';
}
$classPath .= $className.'.php';
return $classPath;
}
public static function resolveIncludePath($classPath) {
$paths = explode(PATH_SEPARATOR, get_include_path());
foreach ($paths as $path) {
$path = rtrim($path, '/\\');
if ($file = file_exists($path.DIRECTORY_SEPARATOR.$file)) {
return $file;
}
}
return false;
}
}
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